
/*******************************************************************************
 * Copyright IBM Corp. and others 2025
 *
 * This program and the accompanying materials are made available under
 * the terms of the Eclipse Public License 2.0 which accompanies this
 * distribution and is available at https://www.eclipse.org/legal/epl-2.0/
 * or the Apache License, Version 2.0 which accompanies this distribution and
 * is available at https://www.apache.org/licenses/LICENSE-2.0.
 *
 * This Source Code may also be made available under the following
 * Secondary Licenses when the conditions for such availability set
 * forth in the Eclipse Public License, v. 2.0 are satisfied: GNU
 * General Public License, version 2 with the GNU Classpath
 * Exception [1] and GNU General Public License, version 2 with the
 * OpenJDK Assembly Exception [2].
 *
 * [1] https://www.gnu.org/software/classpath/license.html
 * [2] https://openjdk.org/legal/assembly-exception.html
 *
 * SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
 *******************************************************************************/

/**
 * @file
 * @ingroup GC_Structs
 */

#include "j9.h"
#include "j9cfg.h"
#if JAVA_SPEC_VERSION >= 24
#include "ContinuationSlotIterator.hpp"

/**
 * @return the next slot in the J9VMContinuation
 * @return NULL if there are no more such slots
 */
j9object_t *
GC_ContinuationSlotIterator::nextSlot()
{
	j9object_t *ret = NULL;
	if (NULL != _monitorRecord) {
		J9MonitorEnterRecord *currentMonitorRecord = _monitorRecord;
		_monitorRecord = currentMonitorRecord->next;
		_state = state_monitor_records;
		ret = &currentMonitorRecord->object;
	} else if (NULL != _jniMonitorRecord) {
		J9MonitorEnterRecord *currentMonitorRecord = _jniMonitorRecord;
		_jniMonitorRecord = currentMonitorRecord->next;
		_state = state_monitor_records;
		ret = &currentMonitorRecord->object;
	} else if (NULL != _vthread) {
		_state = state_vthread;
		ret = _vthread;
		_vthread = NULL;
	} else {
		_state = state_end;
	}
	return ret;
}
#endif /* JAVA_SPEC_VERSION >= 24 */
